Miss Lizette Kent's life is in shambles. Not only did her mother just pass away, but she has been left without the means to provide for herself. While she is contemplating her future, she encounters an unexpected and vexing man: Tristan Westcott, a man that mistakenly seems to believe that she is the daughter of an earl, despite her insistence that she is not.

Rose Portman, determined spinster, has a bit of a predicament. Her great aunt has challenged her to get married before Twelfth Night and promised that, if she does, Rose will inherit the perfect country cottage with the funds to maintain it. Rose has always wanted to get away from London and Society, and this could be her chance! But the catch is that Rose has to attend a holiday house party in York and find a husband among the guests. Worst of all… she must marry for love.

Elena MacKinnon has spent the last seven years training to become a proper English lady. When her childhood friend, Captain Theo Donovan, returns from serving in the Navy, he brings along with him Elena’s humiliation for the ill-advised and ardent love letter she wrote him before his departure, which he ignored entirely. Elena hopes to simultaneously stifle his memory of the letter and make him regret overlooking her, showing him just how fine an English lady she can be. The only problem? She is not English but a proud Scot—and her heart may be more enamored with Theo than ever.

Born with a perfect memory, Lady Elizabeth Beckett has become one of the world's most notorious spies, despite being the daughter of a duke. She is shielded only by her code name: Shadow. When young ladies of High Society begin disappearing from London, Eliza has no doubt who is orchestrating these crimes; a heinous man she has been investigating for years. Vowing to save them before they are sold to the highest bidder, she must risk everything to stop him.

Grace Sinclair has been callously cast out of her home. And though taken in as an orphaned child by the vicar and his wife, her unsurpassed beauty makes it impossible for her to remain in the vicar’s household - with two daughters of their own about to enter Society, the vicar and his wife see Grace as nothing but competition. Thankfully, Grace’s estranged Aunt Bell has agreed to take her in to her home in London. But Grace soon learns her situation has just gotten much worse.

Julia Cummings has long been acquainted with loss - her mother, her brother, her sister, her friend, all gone too soon. But the loss that pushed her grief to the limit as a young girl was that of her best friend, Lucas Jonquil, who abandoned her without looking back. Now, eight years later, Lucas has returned to Lampton Park, and Julia has steeled herself - she will never forgive the man who broke her heart.

Madalene Dowding was devastated when her mother died, leaving her all alone. To honor her mother's legacy, she decides to use part of her fortune to open an orphanage. When a teacher at the orphanage goes missing, Madalene takes it upon herself to start looking for her, even if it means taking her deep into the unsavory parts of London.

Kate Matcham needs a fortune or a husband. She wants neither. With a tainted inheritance in the balance, she receives one offer to become a scoundrel's mistress and another offer of a marriage of convenience. Before resigning herself to a choice, she accepts the invitation to visit a childhood friend, considering it a last hurrah before embarking on a bleak future. The visit goes sideways when she falls for the gentleman her friend intends to marry, a man well out of Kate's league—and one who seems to be hiding something.

Miss Dinah Ashmore has a problem: her sister has gone missing, and the constable isn’t taking it seriously. She decides to take matters into her own hands by hiring a Bow Street Runner, not understanding the danger she has put herself in. Nathaniel Calvert, Earl of Hawthorne, is an agent of the Crown. His assignment is to root out a radical group and bring them to justice. When Miss Ashmore mistakes him as a Bow Street Runner and explains her plight, he suspects that the missing sister might be connected to his case.

After losing her fiancé to a terrible accident, Miss Katherine Blackmore found contentment as a matchmaker to the members of Society. Working alongside her sisters, they strive to secure the most unlikely people with love matches. Everything is perfect until an infuriating lord steps into her office, turning her world upside down. Edward Simpson, the Marquess of Berkshire, has a problem. His sister needs to marry, and quickly. When he approaches Miss Blackmore to hire her services, he does so poorly and ends up soundly insulting her. Luckily, he fares better with his second attempt.

Much to her father's dismay, Miss Amelia Buxton aspires to become a spinster, just like her eccentric aunt. Growing up with parents who married for every reason but love, she has never seen a joyful marriage. When Amelia requests a summer trip to the legendary waters of Brighton, her father allows her the excursion, but with one requirement: She must return engaged, or agree to the proposal of the man of his choosing.

When faced with an unwanted marriage, Alice Rosemeyer accepts an invitation to the estate of Larkhall. Determined to earn her future security without a husband, she begins operating as the anonymous Ace of Hearts, writing letters and offering advice on behalf of the men eager to secure a match at the close of the London season. If she can manage to keep her identity secret, her reputation intact, and avoid the arrogant house guest, Mr. Thomas Herring, she might just call herself successful.

Elsie and her two best friends made a childhood vow to never marry. But when Elsie begins her first season in London, her mother presents her with an irresistible bargain: If she says yes to each and every man's invitations and still remains unattached by the end of the season, she will receive her inheritance and become a free woman. She's thrown into the spotlight by increasing attention in the newspaper gossip articles. Keeping her end of the bargain seems impossible - especially when her best friend's tyrant of a brother begins to make advances that Elsie literally cannot refuse.

Patience Whitford spent the last two seasons watching her elder sisters make grand matches. She is thoroughly apprehensive with the notion of being limited by marriage. But that seems like an inconsequential concern with no prospects on the horizon to follow in her sisters' footsteps. And to make matters worse, she is uncommonly jealous of all of the military officers she's befriended and their grand adventures. When Major Ashley Stuart is assigned to investigate some petty crimes near his brother's estate in Greenwich, it soon becomes apparent that there is something much larger going on.

When their elderly guardian dies, Faith Whitford is determined to set up house in Bath and look for respectable country gentlemen for her four sisters. She has no ambitions for mingling with the ton. What she did not expect was a new guardian, in the form of a London Beau to be appointed over them, nor that he would take any interest in their care.